<!DOCTYPE html>
<html lang="CH">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>

    <!--  语义化标签
    增强型表单
    canvas svg
    音视频
    本地储存和离线储存
-->
<div>语义化标签</div>

<br>
<col>
<embed src="" type="">
    <hr>

    

    
</body>
</html>